G 2425 (OTTO) Glycitein, ≥97% (HPLC) Cas 40957-83-3- used as standard for the analysis of soy isoflavones and metabolites in urine. G 2425 (OTTO) Glycitein, ≥97% (HPLC) Cas 40957-83-3- used to bind to recombinant estrogen and progesterone receptors to know the relative binding affinity (RBA) for detection of potential endocrine disruptors.